<div class="search">
    <div class="search-box">
        <div id="sb-search" class="sb-search">
            <form method="get" action="<?php echo home_url(); ?>">
                <input class="sb-search-input" placeholder="Enter your search term..." type="search" name="s" id="search" />
                <input class="sb-search-submit" type="submit" value="" />
                <span class="sb-icon-search"><i class="glyphicon glyphicon-search"></i> </span>
            </form>
        </div>
    </div>
</div>